RoutingAbout VRF (Virtual Routing and Forwarding)
About VRFVRF stands for Virtual Routing ...
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Routing RoutingPolicy-Based-Routing and IPROUTE2
PBR (Policy-Based Routing)I wrote before...
MPLS-VPNConfiguration of MPLS-VPN (Super Backbone and Sham-Link)
I will introduce of the example of confi...
MPLS-VPNMPLS-VPN (MP-BGP) Details
MP-BGPRoute information in can be transm...
MPLS-VPNMPLS-VPN Overview
The router of the description in the bas...
MPLS-VPNMPLS basic#5 TTL Propagation
The TTL Propagation, when transferring M...
MPLS-VPNMPLS basic#4 PHP (Penultimate Hop Popping)
PHP ThePHP and stands for Penultimate Ho...
MPLS-VPNMPLS basic#3 FIB table / LFIB table
FIB tableIn border router between MPLS N...
MPLS-VPNMPLS basic#2 label exchange and LIB table
In front of the label exchange, by each ...
MPLS-VPNMPLS basic#1 LDP Behavior
MPLS network needs to exchange not only ...
MPLS-VPNAbout MPLS
MPLS (Multi-Protocol Label Switching) is...
Ethernet OAMWhat is Ethernet OAM?
What is OAM?OAM stands for Operations, A...
OSPFRight condition for exchange the router by OSPF
Right condition for exchange the router ...
Link AggregationHow to determine Active port / Standby port by LACP
In LACP, up to 16 Ethernet can be includ...
Link AggregationLACP format and structure
Format of LACPThe format of LACP is as f...
Link AggregationWhat is Slow Protocol
When link aggregation and LACP are stand...
OSPFFeatures of multi-access topology
In multi-access topologies such as broad...
OSPFCondition of OSPF neighbor establishment (2WAY)
What is 2WAYOSPF routers in the same seg...
Must Know As a Network EngineerOSI Reference Model and IP Set Model
What is OSI Reference Model and IP Set M...
FirewallHow Stateful Inspection Works
What is Stateful InspectionStateful Insp...
TCP/UDPFormat of UDP
As mentioned before, UDPis light in load...
TCP/UDPReliability of TCP
TCP reliability is implemented with sequ...
TCP/UDPTCP state transition
TCP has an attribute called " State " th...
TCP/UDPTCP connection
The TCP connection starts with 3 way han...
TCP/UDPTCP Options
TCP options is represented as following ...
TCP/UDPTCP segment format
The communication data unit of TCP is of...
TCP/UDPTCP / UDP Overview
TCP/UDP provides a communication channel...
IPWhat is ICMP ~ Difference from layer and TCP, about how to use ~
What is ICMPICMP stands for Internet Con...
IPWhat is IP address
IP address is the address on network com...
PaloAltoPalo Alto CaptivePortal Authentication Exclusion
In PaloAlto, consider the case for a cer...